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Search: id:A151941
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| A151941 |
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2^(2^n)*( (2^(n-1))! )^2*binomial(2*n,n). |
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| 8, 384, 2949120, 7457942274048000, 473804945588441678165307763458048000000, 11801445031328597741724369678202514902933159573189320761304232566196738619080704\ 00000000000000
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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The number of most-perfect magic squares of order 2^m where m>=2.
The next term is too large to include here.
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MAPLE
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f:=m->2^(2^m)*( (2^(m-1))! )^2*binomial(2*m, m);
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CROSSREFS
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A subsequence of A151932. Cf. A051235.
Sequence in context: A067624 A096204 A153836 this_sequence A085806 A042115 A159515
Adjacent sequences: A151938 A151939 A151940 this_sequence A151942 A151943 A151944
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Aug 12 2009, based on email from Reinhardt Wiewe.
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